The Soulprint Files
DefenseTech got their start as a bodyguard-for-hire service. They then branched out into weapons dealing and government defense contracts. They now have the biggest stockpile of armaments in Los Santos, along with the biggest privatized military force.
Historically, many other corporations contracted out their security to DefenseTech. In the 23rd century, an era marked by corporate paranoia, corporations like Agricorp are increasingly interested in keeping their guards in-house, to avoid divided loyalties. DefenseTech still collaborates with Wing-Arasaka Conglomerate in creating robotic and computerized remote security systems.
The head of DefenseTech, Omar Norman, is an old ex-soldier, veteran of the Third Terran War. He has the dubious distinction of having outlived all of his heirs, and the succession plan for the leadership of the corporation has not yet been decided. Norman appears to have no intention of grooming a replacement, perhaps believing he will never die.